Snap-fastener.



B. N. HUMPHREY.

SNAP FASTENER.

APPLICATION FILED 1mm. 1010.

Patented July 12,1910.

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UNITED STATES PATENT OFFICE;

ERNEST N. HUMPHREY, or NEW BRITAIN, connnc'rrcur, assmnon 'ro warren" sra'rns FASTENER COMPANY, or nosrongmassncnusn-rrs, a CORPORATION or MAINE.

SNAP-FAS TENEK.

To all whom it may concern.-

Be it known that I, ERNEST N. HUM- sna with means such as a screw for securing the stud to wood or similar substances.

In the fasteners of this type heretofore commonly used, the stud is provided with a flange in frictional engagement with a round-headed-screw, and in some instances a small quantity of solder is placed between the socket and thehead of the screw. The stud is countersunk at the top to permit the screw to be driven by a screw driver in It has been found in practice that when the attempt is made to attach studs of this construction to hard wood, or any other substance which otters considerable resistance to the driving of the screw, the'engagement between the stud and screw head is insufficient to resist the twisting strain and prevent relative rotation of the parts, so that these fasteners have proved unsuited for use upon materials of the kind described.

It is the object of this invention to provide a stud member of the class described which shall be simple, ornamental, readily and economically manufactured and so constructed that it. may be attached to hard wood or similar substances without danger of relative rotation of the parts.

- Referring to the drawings, which illustrate embodiments of my 1nvention,I ig-.

ure 1 is a. sectional view of a stud; Fig. 2 is a similar view of a screw; Fig. 3 1s a sum- -lar view of a collet; Fig. 4 is a plan view of the stud shown in Fig. 1; Fig. 5 is a plan view of the screw shown in Fig. 9.; Fig. 6 is a plan view of the collet shown in Fig. 3; Fig. 7 is aplan view of the stud shown in Fig. 1 within the collet shown in Fig. 3; Fig. 8 is'a plan view showing a Illtlt iticd form of stud within the collet; Fig. 9 shows, partly in section and partly inclc-vatiou, the completed fastener member attached to ma terial; Fig. 10 is a plan view of the fastener Specification of Letters Patent.

Application filed April 2,1910. Serial No. 553,107.

member shown in Fig. 9; and Fig. 11 is a sectional view of a modified form.

In the preferred form of the invention shown in Figs. 1 to 9 inclusive and Fig. 10 A is a screw provided with a polygonal head (1, shown in the drawin s as hexagonal.

B is a stud having a Henge 1) preferably of Patented July .12, '1910.

polygonal form as shown in. Figs. 4: and 7 to conform to the shape of the screw head a, but which may be of circular form as shown in Fig. 8, or of any other desired form.- C is a collet provided with a. central opening a and a flange c of the same polygonal form as the screw head a.

In assembling the arts, the shank of the screw A is passed t rough the opening a bringing the c'ollet G into engagement with the lower face of the screw head a. The flange b of the stud B is then placed upon the upper face of the screw head a and the flange c isturned down by a suitable tool -into holding engagement with the flange b thus rigidly securing the screw head and stud which are held a ainst relative rotation by reason of their polygonal form.

In Fig. 11 there is shown a modified formof stud whereby the stud and screw head may be rigidly secured, and held against relative rotation, without the use of a. collet. Referring to said figure, B is-a stud having a polygonal flange I)? of the same shape as the screw head a and of sufficient size to receive said screw head. In assembling the parts in this form of my invention, the screw head a is placed within the flange b" and the latter is then, turned down by a suitable tool into holding engagement with the screw head thus rigidly securing the stud and head which,- as'in the preferred form already described, are held against relative rotation by their qwlygonal shape.

In securing my improved fastener to material, the screw driving tool is not placed upon the head of the stud as in prior constructions, but around the polygonal ortion of the stud which, by reason 0 its shape, is readily gripped and held thereby. The twisting stra n necessarilyincident .to driving the screw home, is thus borne almost entirely by that portion of the fastener best adapted to withstand it, namely, the head of the screw; and as no twisting st rain is placed upon the stud B, all danger of rclat i \'e rotat ion of the parts is eliminated.

Aithough enyj suitehle tool may be emvstud. hnvin a polygonal flange in engage- '2 ployedfor screwing'the stud to material, I ment with file upper face of szud head, and u 15 prefer Qne'haV'ing an opening adapted to fit colleh 1n engagement with the lower face of thepolygdnal' portion and rovided with a salhi'had havmg a polygonal flange turned '5' recesstp receive-the head 0 the stud. j -0\"$,i:\"i r 1to holdm engagement with the -,,I c1mm:' flange ()f said stu =5; fnstex'ier lnember, the combination slgned by me at New Britain, Connecti- 20 with aistud having mfien e, of a screw we cut, this twenty-sixth day of March, 1910.

vided with a poly ona1. ead anfl e collet w 1 10 having a, polygona flange adapted rigidly L F N'HUMPHREY' to secure'said stud' and said head. 1 Witnesses:

-2. In a'fastener member, the combination A. H. HeUcn'roN with asc rew hilving a, polygonal head, of a G 0. HOLMES. 

